<template>
  <div class="cmt-container">
    <h1>发表评论</h1>
    <hr>
    <textarea placeholder="最多吐槽120字" maxlength="120" v-model="msg"></textarea>
    <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
    <div class="cmt-list" v-for="(item, i) in comments" :key="item.id">
        <div class="cmt-item">
            <div class="cmt-title">
                第{{i+1}} 楼&nbsp;&nbsp; 用户：{{item.user_name}}&nbsp;&nbsp;发表时间：{{item.add_time | dateFormat}}
            </div>
            <div class="cmt-body">
                {{item.content === 'undefined' ? '此用户很懒，什么都没说': item.content}}
            </div>
        </div>
    </div>
     <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
  </div>
</template>

<script>
import { Toast } from "mint-ui";
export default {

  data () {
    return {
        pageIndex :1, // 默认显示第一页
        comments:[], // 存储所有的评论数据
        msg: ''  // 获取用户提交的评论内容
    }
  },

  methods: {
      getComments(){
          this.$http.get("http://www.liulongbin.top:3005/api/getcomments/"+this.commentsId+"?pageindex="+this.pageIndex).then(result=>{
              if(result.body.status ==0){
                  this.comments = this.comments.concat(result.body.message);
              }else{
                  Toast('获取评论失败');
              }
          });
      },
      getMore(){
          this.pageIndex ++;
          this.getComments();
      },
      postComment(){
        if(this.msg.trim().length==0){
            return Toast('评论内容不能为空');
        }
        this.$http.post("http://www.liulongbin.top:3005/api/postcomment/"+ this.$route.params.id, {
            content: this.msg.trim()
        }).then(function(result){
            if(result.body.status == 0){
                var cmt = {
                    user_name:'匿名用户',
                    add_time: Date.now(),
                    content:this.msg.trim()
                };
                this.comments.unshift(cmt);
                this.msg = '';
            }else{
                Toast('发表评论失败');
            }
        })
      }
  },
  props: ["commentsId"],
  created () {
      this.getComments();
  }
}
</script>

<style lang='less'>
    .cmt-container{
        h1{
            font-size: 18px;
        }
        textarea{
            font-size: 14px;
            height: 85px;
            margin: 0;
        }
        .cmt-list{
            margin: 5px 0;
            .cmt-item{
                font-size: 13px;
                .cmt-title{
                    line-height: 30px;
                    background-color: #ccc;
                }
                .cmt-body{
                    line-height: 35px;
                    text-indent: 2em;
                }
            }
        }
    }
</style>
